<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app"></div>
    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>
    <script src="../js/prop-types.js"></script>
    <script type="text/babel">
        class Person extends React.Component {
            showIptContent = () => {
                const { ipt1 } = this.refs
                alert(ipt1.value)
            }
            render () {
                console.log(this)
                return (
                    <div>
                        {/* 通过ref绑定dom，会自动挂载到组件实例的refs上*/}
                        <input ref="ipt1" type="text" />
                        <button onClick={this.showIptContent}>点我查看输入框内容</button>
                    </div>
                )
            }
        }
        ReactDOM.render(<Person />, document.getElementById('app'))
    </script>
</body>

</html>